| 摘要 |
<p>The invention concerns an arrangement for regulation of power in a tractor or in a mobile work machine, which tractor or work machine is provided with an engine (1), with a running power transmission (2) driven by the engine (1) by the intermediate of a clutch, with hydraulic pumps (7) of the hydraulic system operated by a drive shaft (6) permanently connected with the crankshaft (4) of the engine, and with a power take-off mechanism (3) connected with said drive shaft (6) by the intermediate of a disconnecting clutch (8). The engine (1) has been constructed so that it can be switched to operate optionally in at least two different power ranges, i.e. a higher power range and a lower power range. The running power transmission mechanism (2) has been dimensioned in accordance with the maximum output of the lower power range of the engine (1), and the power take-off mechanism (3) has been dimensioned in accordance with the maximum output of the higher power range of the engine (1). The system is provided with a control that prevents the use of the higher power range of the engine (1) unless the power take-off mechanism (3) and/or the other auxiliary equipment takes/take, from the engine (1), at least a torque ( DELTA M) equal to the difference between the torque corresponding to the higher power range of the engine (1) and the torque corresponding to the lower power range of the engine (1). <IMAGE></p> |
